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I06. COMPOSITIONS,

COATING R PLASTIC UNITED STATES Cross Reference PATENT OFFICE.

'PROCESS OF MAKING AND COMPOSITION FOR PAVEMENTS AND OTHER PURPOSES.

SPECIPICATION'fonmngpart of Letters Patent No. 302,679, dated July 29, 1884.

Application filed February 20, 1584. -(No specimens.)

. .To all whom it may concern:

Be it known that I, JOHN E. WYNK'ooP, a citizen of the United States of America. residing at Pottsville, in the county of Schuylkill and State of Pennsylvania, have invented a new and useful Improvement in Processes of Making and Compositions for Pavements and other Purposes, which I term Cinderlithic Pavement or Composition, of which the I'o following is a specification.

'This invention-relates to compositions for artificial stone, especially adapted for sidewalks and for other purposes, such as building-blocks and drain and water pipes, and the art of making the same.

In making this composition I take sla or cinder such as comes from blast-furnaces and granulate it into grains of determinate sizes, from a two-inch cube to such as will pass through a number-ten sieve. The ranules of different sizes are carefully proportione so as 0 1e omsnmenpn'eennitnfi'fitin. This m'Tiirnace-slag is then mixed with Portland cement in the proportions of four parts oi granulated slag to one part of cement, or thereabout, as the character of the work may require. This mixture of cement and furnace-slag in grains of regulated sizes is then dampened with lime-water containing a solution of adhesive material, and placed,

w 1c in this dampened and comparativelydry nolrplastic'state, in the molds, care being taken that the granules are evenly distributed; and then the mass is subjected to a severe tamping until it is reduced to about one-third ofits original bulk when placed in the mold, and then it is allowed to harden.

.' The 1i uidrnixture for dam enin thegrannlated slag may be composed oi glue three 40 parts; starch, three parts; lime, ree par-ts,

and water one hundred parts.

In laying artificial-stone pavements with ",his composition Iprooecd as follows: To form a section of the pavement I lay down pieces of timber called racks or "screeds, of

suitable length and thickness. The racks are rigidly fastened to the ground by pins, and

constitute a mold for the composition. This mold is then filled flush with the surface-line of the pavement with the composition above A/',/ 7) 1 v described in a comparatively dry state. The composition is then subjected to a severe tamping with iron tamping-bars, which reduce it to one-third of its original thickness. This compact layer is then lined off in any suitable design, and subsequently out through on the lines indicated, forming squares or blocks. The surface is then well scratched or scored to receive the finishing layer. For the finish in laer I take granulated furnace-sla or very sharp sand and mix iimnd cement, in the proportions of about six parts -d'i'fi'flgor sand to four parts of cement. These materials are then mixed in a plastic state with the li'gpiltwl mixture above described. The 6 mold is t en e wi the plastic mass, which forms the top layer. This layer is out on lines to correspond with the cutting of the foundation layer and allowed to harden. The racks are removed and used as a mold for another section, which is filled as before.

I am aware that furnace-slag has heretofore been used in compositions for pavements and other purposes; but it has heretofore been used in a finely pulverized or powdered form, and mixed to a plastic state with other ingredients, while in my invention it is usedin granulated form and a non-plastic state.

- I claim as my invention and desire to secure by Letters Patent- 1. A composition for pavement-s and other purposes, composed of furnace-slag in grains of regulated sizes, as described. and Portland cement, in about the proportions set forth, dampened with lime-water containing adhes sive matter, and the mass thoroughly tainped and allowed to harden, substantially as set forth.

2. The process of making, compositions, which consistsin mixing furnace-slagin grains of regulated sizes, as described, and cement, in about the proportions set forth, dampening said mixture with lime-water containing adhesive matter, then tamping-said mixture in molds while in the dampened, comparatively 5 dry, and non-plastic state, and allowing, the same to harden, substantially as set forth.

3. The process of layinga pavement, which consists in spreading a foundation layer composed of furnace-slag in grains of regulated roc- EXAMINEI sizes in a nonplastic state, and dampened I In testimony whereof I afiix mysignatnrc in with lime-water containing adhesive matter, the presence of two witnesses.

then compacting or tamping the same, then cutting said foundation layerinto divisions or J OHN WYNKOOP. blocks, and then spreading the finishing layer composed of furnace-slag or sharp sand and Witnesses:

cement mixed to a plastic state, with such JAS. C. WILLLUIs,

lime-water, substantially as described. Lewis GRANT. 

